{"instruction": "You are an expert in relationship extraction. Please extract relationship triples that match the schema definition from the input. Return an empty list for relationships that do not exist. Please respond in the format of a JSON string.", "schema": ["country of headquarters", "title of person", "founded"], "input": "Northside High School  ( NHS ) located in the northern area of Roanoke County Virginia first opened its doors to students in December  1960  ."}
{"country of headquarters": [], "title of person": [], "founded": [{"subject": "Northside High School", "object": "1960"}]}